Radio phonographic apparatus



Jan. @2,1932 D EHRET 11,340,772

RADIO PHONOGRAPHIC APPARATUS Filed Nov, 1o, 1924 Patented Jan. 12, 1932 PATENT OFFICE CORNELIUS D. EHRET, OF PHILADELPHIA, PENNSYLVANIA RADIO PHONOGRAPHIC APPARATUS Application led November 10, 1924. Serial No. 748,850.

My invention relates to radio receiving and phonographic systems in combination with control structure which prevents operation of the radio receiving system during operation of the phonographic system; more p articularly the phonographic system comprises movable structure which during the operation of the phonographic system precludes operation of the radio receiving system.

Further in accordance With my invention loud speaking apparatus vmay be operated by sound-representing current amplifying means While movable structure comprised in the phonographic system is in 'a predeteri5 mined position; and more particularly operation of the loud speaking apparatus by the amplifying means is prevented While movable structure comprised in the phonographic system is in a predetermined position.

Further in accordance with my invention the operation of the radio receiving system is dependent upon joint controls, one of them dependent upon the operation of the phonographic system.

Further in accordance With my invention there is provided a member, common-to the radio receiving and phonographic systems, for delivering reproduced sound to the outer air, in ass-ociation with means controlled by movable structure comprised in the phonographic system for preventing operation of the radio receiving system during operation of the phonographic system.

Further in accordance with my invention with means preventing operation of the radio receiving system during operation of the phonographic system is associated a switch controlling operation of the radio receiving system; and more particularly there is operative with said switch a member which controls alternate communication with the outer air of passages comprised respectively in the phonographic and radio receiving systems.

My invention resides in apparatus of the character hereinafter described and claimed.

For an illustration of some of the various forms my invention may take, reference vis to be had to the accompanying drawings-in which:

Fig. 1 is a view partly in perspective, partly suitable type and comprising, as Well underin section, and diagrammatic, illustrating one of the various embodiments of my invention.

Fig. 2 is a sectional view, partly in elevation, of a portionof the apparatus shown in Figs. 1 and 3.

Fig. 3 is a view of the character of Fig. 1, including an additional switch associated with the phonographic apparatus.

Fig. 4 is an elemental illustration of a modified form of telephonie sound reproducer.

Referrin to Figs. 1 and 2, 1 represents the turn ta le for supporting and rotating a phonographic record, driven, as Well understood in the art,- by the spring or other motor M. The horn or equivalent sound amplifying means H is provided with two branching sound passages 3 and 4. Communicating With the passage 3 is the swinging or pivoted phonograph sound arm or passage 5 having the pivotal joint. 6 with passage 3, and hav- 70 ing pivoted thereon at 7 the U-shaped tube or sound passage 8 carryin at its end the phonographic sound repro ucer P of any stood in the art, a diaphragm actuated b a stylus 9 engaging in the record groove. ar-

ried by or suitably associated' with the branch 4 is the telephonie sound reproduced T, controlled by radio receiving apparatus and comprising, as Well understood in the art, the S0 diaphragm 10 and the electro-magnets 11, 11,

forming part of a magnet system having also a permanent magnet yoke 12, the windings of the magnets 11, 11, being traversed as usual by sound representing current. f The radio receiving apparatus may be of any suitable type or character, for example such as comprises one or more vacuum tubes or audions V, V1 and V2, each comprising a filament or cathode f, a grid or control elecl trode g, and a plate or anode The battery B furnishes electrical energy .for the anode or plate circuits of the tubes, as Well understood in the art. In the example illustrated, the battery B is in the anode circuit of the tube V2, which may be a detector tube or the last audio frequency amplifier of several ,stages For example the tube V may be a'detector tube, in advance of which may be utilized, as Well understood in the art, one or Adjacent the ends of`the passages 3 and lwhere they join or ,otherwise co-act with the horn H or equivalent., there is disposed inside ofthe structure a movable valve, ap, door or like member 13 secured to its pivot or pivotal rod 14 provided with a handle or knob 15, which may be on the exterior of the housing or cabinet C, within which either or both of the phonographic and radio apparatus may be disposed.

Secured upon the rod 141, or in any other suitable way actuated simultaneously therewith by the knob or handle 15, is the movable switch member 16 adapted to engage and connect the stationary switch contacts 17 and 18. ln the position indicated the switch is closed, thereby closing the circuit between the source A and the filaments f, permitting theradio apparatus to operate and control the instrument T.

When the switch is in the closed circuit position indicated, the member 13 is in the position indicated in Figs. 1 and 2, closing communication between the phonographic reproducer P and the horn H, but permitting' communication between the telephonie reproducer T and the horn H.

With the parts in the position indicated, when the receiving apparatus is functioning, sound-representing current traverses the magnets 11, 11, correspondingly vibrating the diaphragm 10, which reproduces sound waves which travel along the passage 4 to the horn H in the manner well understood in connection with loud speakers in the radio art.

When it is desired to use the phonographic aparatus the handle l5 is rotated, moving the member 13 to position to close the outlet of the passage 4 and to open the outlet of the passage 3, thereby bringing the phonographic reproducer P into operative relation with the horn H.

The same movement of the knob 15 removes the movable switch contact 16 away from the contacts 17 and 18, thereby interrupting the circuit of the source A and the filaments f, whereby the radio apparatus cannot function or operatey while the phonographic apparatus is in condition for operat1on or in cooperative relation to the horn H.

vided an additional switch, in series with the switch 16, 17, 18, the source A and the filaments f. The additional switch comprises the relatively fixed contact 19 and the movable contact 2O mounted upon any suitable portion of the phonographic apparatus and so related thereto that the switch 19, 2O may not be closed when the phonographic apparatusis in position or condition other than a certain or predetermined position or condition. 20 is carried by or movable with the arm 21 pivoted at 22 and positively or frictionally connected with the oke 23, with one arm 24 of which co-acts a pin 25, carried by and movable with the tone arm 5. Pivoted at 26 is the arm 27 carrying the brake shoe 28 adapted upon swinging of the arm 27 in counterclockwise direction, as viewed in Fig. 3, to move into engagement with the flange or suitable portion of the recordcarrying turn table. The arm 27 is provided with the notch 29 in which is adaptedto engage the end of the lever 21, and a tension spring 30, connected at its one end to the arm 21 and at its other end to member 27. When the phonographic sound reproducer traverses the record the arm 5 swings about its pivot 6, as well understood in the art, eventually bringing the pin 25 into engagement with the yoke arm 24C, rotating it and the lever 21, to disengage the lever 21 from the notch 29, whereupon the spring 30 contracts and sets the brake shoe 28 against the turn table, bringing it and the record to rest when the stylus has completed its traverse of the sound record and its groove.- When the lever 21 has been so op. erated by the pin 25, at the completion of reproduction from the record, the switch 19, 20 is closed.

Accordingly the radio apparatus becomes operative, due to energization of its iilaments by the battery A, when the sound arm 5 is in the od or non-reproducing position. Movement of the switch member 16 to the circuit closing position indicated in Fig. 3 will cause energization of the filaments f only when the switch 19, 20 is closed. In this instance again the switch member 16 is moved to circuit closing position when the member 13 is moved to position to close communication between the sound passage 3 and the horn H.

While the instrument T has been described as comprising a permanent magnet system it will be understood that other types may be employed such for example as illustrated in Fig. 4, where T1 is of a character comprising an electro magnetic eld, produced by the winding 31 in association with the field or core structure 32 with which co-acts the coil 33 suitably mechanically Connected to the diaphragm 10 for vibrating it. In this case the coil 33 is connected inthe circuit in place of the coils 11, 11, Figs. 1 and 3, and the coil 31 receives current from any suitable source,

In the example illustrated contact prising telephonie and phonographic reprof such for example as the source A, in which case communication between the source A andi the windin 31 may be controlled by the switch 16, 1 18, -or a duplicate thereof simi- 5 larly operated by themember 15 which simultaneously operates orl controls the member 13 What I claim is: c

1. Radio phonographic apparatus comprisl0 ing telephonie and photographic reproducers, a horn, means orlinterchanging communication1 between said. reproducers and said horn, a switch controlling operation of said telephonie reproducer, means vfor actu- 4 y l graphic apparatus and controlling operation 1f ating said means and said switch in unison and a second switch controlling operation o said telephonie reproducer and controlled by movement of apart of the phonographic apparatus.

2. Radio phonographic apparatus com'- ducers, a horn, means for interchanglng communication between saidreproducers and said horn, a switch controlling operation of said telephonie reproduoer, means' for actuating said means and said switch in unison, and a second switch controlled by movement of a part of the phonographic apparatus and disposed in series with said first named switch. l

3. In combination, a telephonic reproducer, a phonographic reproducer comprising a turn table carrying a phonographic record, a horn, means for interchangmg coml munication between said reproducers and said horn, a switch controlling operation of said'telephonic reproducer, means for actuating said means and said switch in unison, and a second switch controlling operation of said telephonic reproducer and controlled by movement'of a part 4ofsaid phonographic reproducer upon completion of predetermined movement of said turn table.

4. In combination, a telephonie reproducer, a phonographic reproducer comprising a turn table carrying a phonographic record, and structure movable in Aresponse to completion of predetermined movement of said turn table, ahorn, means for interchanging communication between said reproducers and said horn, a switch controlling operation of said telephonie reproducer, means Afor actuating said means and said switch in unison, and a second switch controlling operation of said telephonie reproducer and controlled by said structure in response-to its movement. v

5. In a sound reproducing system, telephonic loud speaker apparatus, phonographic reproducing apparatus, and means controlled by a moving element of said phonographic r apparatus precluding energization of said loud speaker apparatus during normal reproducing operation of 'said phonographic Aappa 05 ratus.

tion of said radio receiver during normal reproducing operation of said phonographic apparatus.

7. In asound reproducing system, electrlc amplifying means, sound reproducing apparatus controlled by said means, phonographic apparatus, a switch controlling operation of f said amplifying means, and a 'second switch controlled by a moving part of said phonoof said amplifyingmeans. i

8. In a sound reproducing system, loud speaker apparatus, phonographic apparatus, a switch controlling operation of said loud speaker ap aratus, a second switch operable to provide or operation of said loud speaker apparatus, and means associated with and actuated by said phonographic apparatus to effect actuation of said second switch.

9. In a sound reproducing` system, loud speaker apparatus, phonographic apparatus,

la switch controlling operation of said loud speaker apparatus, and a second switch in series with said first-named switch closed subvstantially'upon completion of a phonographlic reproduction to effect operation of said loud speaker with said rst switch in closed circuit position.

10. In a sound reproducing system, loud speaker apparatus, phonographic apparatus, a manually operable switch controlling operation of said loud speaker apparatus, and a second switch controlled by an element of said phonographic apparatus precluding operation of said loud speaker apparatus during a phonographic reproduction.

11. In a sound reproducing system, loud speaker apparatus,electric amplifying means therefor, phonographic apparatus, a manually operable switch controlling operation of said vamplifying means, and a second switch in series with said first-named switch adapted to be closed by said phonographic apparatus substantially upon completion of a phonographic reproduction.

12. 'Ihe combination with a radio receiving system comprising means for amplifying sound-representing current, and loud speaker apparatus adapted-to be operated by said amplifying means, of a phonographic system, a switch controlling operation of said .loud speaker apparatus by said radio receiving system, and a second switch controlled by a member comprised in said Vphonographic system and providing for operation of said loud speaker apparatus by said amplifying means.

. 13. The-combination with a phonographic system, of a radioreceivingsystem compris-v ing means for amplifying sound-representing current, a member common to said phonographic and receiving systems for impress- 1n sound waves upon the air, a membercomprised in said phonographic system, and a 5 switch forming part of said radio receiving system and controlled by said member.

14. In a sound reproducing system, a source of sound representing current, telephonic loud-speaker apparatus, amphfyin 1 means utilizing thermionic tubes inte ose between said source and said telephonie oudspeaker apparatus, phonographlc reproducing apparatus for. reproducing sound inde.- pendently of said telephonie apparatus, and

a switch controlling operation of said ampliying means and controlled by a moving part of said phonographic apparatus. CORNELIUS D. EHRET. 

